The Springfield Kingpin 13" Fixed Height Seat Post is built for durability. Made with long-lasting stainless steel, this post provides a full 5" offset extension.• 13" hefty 1-3/4" dia. stainless steel post with mild steel e-coat pin• Provides a full 5" offset extension• Use with any KingPin seat mount (sold separately)• Use with standard 3/4" KingPin base (sold separately)• Mfr. Warranty: 5 years Hefty 1-3/4"" dia. stainless steel post Mild steel e-coat pin Use with standard 3/4"" KingPin base (sold separately) | Springfield Marine KingPin 13" Offset Fixed Height Post, Stainless Steel